This article applies for both mobile phone application and the PC application.
You will need your extensions number, extension password (provided by the support) and your SIP domain name. Your SIP domain name is the example.ie part of your email address if your email address is "testuser@example.ie"
Open PortSIP application, type your extension number, extension password and the SIP domain name Then, press the little gear icon on the top right corner.
Add your name to the "Display Name" bracket and your extension number on the "Authorisation Name" bracket.
Make sure that the "Outbound Proxy Server" is set as ucp004.solgari.com:5063.
Lastly, change the "Transport" section from the drop down menu to "TCP" and the other options are as below image. Click save and log into the application.